Research On Network Coding In P2P Download System

With the development of Internet, emergence of network technology, networkcoding technology since has produced, due to the potential advantages of networkcoding, have more and more research on it, the application field is more and morewidely.P2P because of its distribution, self-organization characteristics on the Internet,especially the application of P2P file download has spread to the wholenetwork.Combined with the application of network coding technology and P2Ptechnology is one of the main research task of current, network coding technologycan improve the P2P network throughput, improving broadband utilization rate, butalso because of the dynamic characteristic of P2P nodes in the network, there will bethe file download in unable to download the entire file case.Therefore, based on theresearch of P2P technology and network coding technology, and analyzes the networkcoding P2P file download network coding techniques are applied in the system basedon the existing network coding technique, the application in the P2P file download isimproved, and in order to increase the security file in P2P network, increase a securenetwork coding module.The main work of this paper are as follows:1、On four kinds of existing network coding methods used in P2P file downloadsystem are analyzed and studied, the advantages and disadvantages of them.2、Based on the existing network coding method, puts forward secure networkcoding method is improved, secure network coding method improved by theimproved generation network coding method and secure network coding methods oftwo modules, two modules algorithm at the same time, collaborative work.3、Through theoretical analysis of the new generation network coding methodand anti hacking network method. The improved method of generation networkcoding to achieve a number of code blocks without generation, generation, generation,generation of cross network coding method in linear coding time and the resulting fileinformation is implemented on a win-win effect. Anti bugging module generated bychaotic sequence to encrypt the original file information, chaotic mapping is used intraditional Logistic mapping can earlier enter into chaotic states, improves thesecurity of information in the P2P file download system.4、To simulate the generation of network coding method is improved and secure network coding method, accords with the theoretical analysis on the. The number ofcode blocks improved generation network coding method in linear coding time andthe resulting file information is implemented on a win-win effect. Secure networkcoding module to the original file information is encrypted, the anti interceptioneffect is good, and enhance the security of information in the P2P file downloadsystem.